Pressure sensor apparatus

Abstract

Provided is a pressure sensor apparatus, including: a pressure sensor unit; a case configured to house the pressure sensor unit; and a plurality of lead terminals configured to be exposed toward outside of of the case, wherein the plurality of lead terminals include a first terminal, a second terminal, and a ground terminal; and the ground terminal, the first terminal and the second terminal are arranged in an order of the ground terminal, the first terminal, and the second terminal outside the case. The pressure sensor apparatus includes a capacitor for a second terminal arranged across the ground terminal and the second terminal in between in interior of the case.

What is claimed is: 
     
         1 . A pressure sensor apparatus, comprising:
 a pressure sensor unit configured to convert pressure into an electrical signal;   a case configured to house the pressure sensor unit; and   a plurality of lead terminals configured to be exposed toward outside of the case,   wherein   the plurality of lead terminals include at least a first terminal, corresponding to one of an output terminal configured to output a signal based on the electrical signal and a power source terminal configured to supply electrical power to the pressure sensor unit, a second terminal corresponding to another one of the output terminal and the power source terminal, and a ground terminal;   the ground terminal, the first terminal and the second terminal are arranged in an order of the ground terminal, the first terminal, and the second terminal outside the case; and   the pressure sensor apparatus includes a capacitor for a second terminal arranged across the ground terminal and the second terminal in between in interior of the case.   
     
     
         2 . The pressure sensor apparatus according to  claim 1 , further comprising a capacitor for a first terminal arranged between the ground terminal and the first terminal in interior of the case. 
     
     
         3 . The pressure sensor apparatus according to  claim 2 , wherein the capacitor for the first terminal and the capacitor for the second terminal are arranged on a back surface of the lead terminal. 
     
     
         4 . The pressure sensor apparatus according to  claim 2 , wherein:
 the case includes a base portion having the pressure sensor unit arranged therein, and a wall portion protruding from the base portion to surround the pressure sensor unit; and   the capacitor for the first terminal and the capacitor for the second terminal are respectively arranged in a position overlapping with the wall portion in a top view.   
     
     
         5 . The pressure sensor apparatus according to  claim 3 , wherein:
 the case includes a base portion having the pressure sensor unit arranged therein, and a wall portion protruding from the base portion to surround the pressure sensor unit; and   the capacitor for the first terminal and the capacitor for the second terminal are respectively arranged in a position overlapping with the wall portion in a top view.   
     
     
         6 . The pressure sensor apparatus according to  claim 4 , wherein the ground terminal is configured to extend up to a position where the capacitor for the second terminal and the wall portion overlap to each other in a top view. 
     
     
         7 . The pressure sensor apparatus according to  claim 5 , wherein the ground terminal is configured to extend up to a position where the capacitor for the second terminal and the wall portion overlap to each other in a top view. 
     
     
         8 . The pressure sensor apparatus according to  claim 4 , wherein:
 one end of the ground terminal is exposed toward outside of the case;   another end of the ground terminal is divided into a first extending portion and a second extending portion;   the first extending portion and the second extending portion are arranged to sandwich the pressure sensor unit; and   the first extending portion and the second extending portion are respectively configured to extend up to the wall portion.   
     
     
         9 . The pressure sensor apparatus according to  claim 5 , wherein:
 one end of the ground terminal is exposed toward outside of the case;   another end of the ground terminal is divided into a first extending portion and a second extending portion;   the first extending portion and the second extending portion are arranged to sandwich the pressure sensor unit; and   the first extending portion and the second extending portion are respectively configured to extend up to the wall portion.   
     
     
         10 . The pressure sensor apparatus according to  claim 1 , wherein:
 one end of the ground terminal is configured to be exposed toward outside of the case; and   another end of the ground terminal is configured to extend along at least three edges of the pressure sensor unit.   
     
     
         11 . The pressure sensor apparatus according to  claim 2 , wherein:
 one end of the ground terminal is configured to be exposed toward outside of the case; and   another end of the ground terminal is configured to extend along at least three edges of the pressure sensor unit.   
     
     
         12 . The pressure sensor apparatus according to  claim 3 , wherein:
 one end of the ground terminal is configured to be exposed toward outside of the case; and   another end of the ground terminal is configured to extend along at least three edges of the pressure sensor unit.   
     
     
         13 . The pressure sensor apparatus according to  claim 4 , wherein:
 one end of the ground terminal is configured to be exposed toward outside of the case; and   another end of the ground terminal is configured to extend along at least three edges of the pressure sensor unit.   
     
     
         14 . The pressure sensor apparatus according to  claim 5 , wherein:
 one end of the ground terminal is configured to be exposed toward outside of the case; and   another end of the ground terminal is configured to extend along at least three edges of the pressure sensor unit.   
     
     
         15 . The pressure sensor apparatus according to  claim 6 , wherein:
 one end of the ground terminal is configured to be exposed toward outside of the case; and   another end of the ground terminal is configured to extend along at least three edges of the pressure sensor unit.   
     
     
         16 . The pressure sensor apparatus according to  claim 7 , wherein:
 one end of the ground terminal is configured to be exposed toward outside of the case; and   another end of the ground terminal is configured to extend along at least three edges of the pressure sensor unit.   
     
     
         17 . The pressure sensor apparatus according to  claim 8 , wherein:
 one end of the ground terminal is configured to be exposed toward outside of the case; and   another end of the ground terminal is configured to extend along at least three edges of the pressure sensor unit.   
     
     
         18 . The pressure sensor apparatus according to  claim 9 , wherein:
 one end of the ground terminal is configured to be exposed toward outside of the case; and   another end of the ground terminal is configured to extend along at least three edges of the pressure sensor unit.   
     
     
         19 . The pressure sensor apparatus according to  claim 1 , wherein:
 the case includes a first surface having the ground terminal exposed, the first surface sandwiching the pressure sensor unit and a second surface positioned on an opposite side;   the plurality of lead terminals further include a plurality of auxiliary terminals configured to be exposed from the second surface; and   the pressure sensor apparatus further includes a capacitor for an auxiliary terminal arranged between the ground terminal and at least some of the plurality of auxiliary terminals in interior of the case.   
     
     
         20 . The pressure sensor apparatus according to  claim 19 , wherein the plurality of auxiliary terminals include a first auxiliary terminal group connected to the ground terminal via the capacitor for the auxiliary terminal in interior of the case, and a second auxiliary terminal group not connected to the ground terminal via the capacitor for the auxiliary terminal in interior of the case.